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An arched masonry structure supporting and forming a ceiling, whether freestanding or forming part of a larger building.
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Any arched ceiling or roof.
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Anything resembling such a downward-facing concave structure, particularly the sky and caves.
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The space covered by an arched roof, particularly underground rooms and church crypts.
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Any cellar or underground storeroom.
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Any burial chamber, particularly those underground.
example
Family members had been buried in the vault for centuries.
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The secure room or rooms in or below a bank used to store currency and other valuables; similar rooms in other settings.
example
The bank kept their money safe in a large vault.
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A piece of apparatus used for performing jumps.
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A gymnastic movement performed on this apparatus.
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An encrypted digital archive.
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An underground or covered conduit for water or waste; a drain; a sewer.
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An underground or covered reservoir for water or waste; a cistern; a cesspit.
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A room employing a cesspit or sewer: an outhouse; a lavatory.